Fix dark mode text visibility in all form inputs

Add bg-paper class to global input/textarea/select styling. Previously text-ink
was applied but inputs lacked background color, causing light text on light backgrounds.

Now all form inputs globally have:
- bg-paper for proper dark mode background
- text-ink for readable text in both light and dark modes

Fixes visibility issues on custom-request, contact, and all other form pages.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

src/app/globals.css

@@ -27,7 +27,7 @@
   input,
   textarea,
   select {
-    @apply text-ink;
+    @apply bg-paper text-ink;
   }
   ::selection {
     @apply bg-splash-pink text-paper;